CN110272749A - A kind of tedge pneumatic blasters devices and method - Google Patents
A kind of tedge pneumatic blasters devices and method Download PDFInfo
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- CN110272749A CN110272749A CN201910660786.2A CN201910660786A CN110272749A CN 110272749 A CN110272749 A CN 110272749A CN 201910660786 A CN201910660786 A CN 201910660786A CN 110272749 A CN110272749 A CN 110272749A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005488 sandblasting Methods 0.000 claims abstract description 97
- 238000004140 cleaning Methods 0.000 claims abstract description 43
- 239000002245 particle Substances 0.000 claims abstract description 21
- 239000003245 coal Substances 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 9
- 239000000428 dust Substances 0.000 claims abstract description 6
- 230000003068 static effect Effects 0.000 claims description 76
- 230000001174 ascending effect Effects 0.000 claims description 68
- 239000004576 sand Substances 0.000 claims description 64
- 239000007789 gas Substances 0.000 claims description 42
- 230000007246 mechanism Effects 0.000 claims description 33
- 238000010926 purge Methods 0.000 claims description 33
- 238000007789 sealing Methods 0.000 claims description 26
- 239000011229 interlayer Substances 0.000 claims description 18
- 238000007664 blowing Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 239000002817 coal dust Substances 0.000 claims description 4
- 230000002441 reversible effect Effects 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 230000033001 locomotion Effects 0.000 abstract description 4
- 230000000630 rising effect Effects 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 241000883990 Flabellum Species 0.000 abstract 1
- 238000005422 blasting Methods 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 239000000571 coke Substances 0.000 description 16
- 239000012530 fluid Substances 0.000 description 13
- 230000002829 reductive effect Effects 0.000 description 10
- 239000000779 smoke Substances 0.000 description 8
- 238000004939 coking Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000010408 sweeping Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B27/00—Arrangements for withdrawal of the distillation gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B43/00—Preventing or removing incrustations
- C10B43/02—Removing incrustations
- C10B43/04—Removing incrustations by mechanical means
- C10B43/06—Removing incrustations by mechanical means from conduits, valves or the like
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a kind of tedge pneumatic blasters devices and methods, belong to tedge and clean field.Tedge pneumatic blasters devices of the invention and method, medium is cleaned as injection using pulverized coal particle, rotoblast cleaning is carried out to rising inside pipe wall in the way of suction-type rotoblast, while comprehensive sandblasting cleaning is carried out to rising inside pipe wall in the way of axial reciprocating movement；In sandblasting cleaning process, inhibit the exhaust gas dust in tedge excessive using the synchronous driving flabellum rotation of rotary power.Suction-type rotoblast drives rotation using the opposition that blasting jet generates, while providing the sucking power of pulverized coal particle by the negative-pressure sucking of high-pressure gas jet generation；When tedge wall deposits adhesive force is weaker, pure air-flow is optionally sprayed.The present invention is cleaned by contactless sandblasting, and cleaning effect is good, and high reliablity effectively reduces atmosphere pollution, and simple and compact for structure, flexible and convenient operation.
Description
Technical Field
The invention relates to a device and a method for cleaning the inner wall of a riser, in particular to a device and a method for pneumatically purging the riser.
Background
In the coking process, coal is dry distilled in a coking chamber, the generated raw coke gas is collected in the top space of the coking chamber, enters an ascending pipe and enters a gas collecting pipe through a bridge pipe, the temperature of the inner wall of the ascending pipe is lower than the temperature of flue gas, and the surface is easy to coke and deposit graphite. The ascending pipe is positioned at the upper part of the coke oven and is a section of vertical pipeline for guiding out the crude gas collected to the top space of the carbonization chamber. The raw gas and some entrained smoke impurities are led into the gas collecting pipe through the riser pipe and then the bridge pipe for utilization. At present, a cleaning device for an ascending pipe is not involved in the initial setting of the domestic coke oven. At present, the problem of coking and graphite formation is increasingly highlighted due to the fact that the temperature of the top space of the carbonization chamber furnace is high, and the temperature of the inner wall of the ascending pipe, particularly the inner wall of the waste heat recovery ascending pipe, is low. Along with the increase of the thickness of the deposition layer, the space of the inner container of the ascending pipe is smaller and smaller, the pipeline is not smooth, the smooth export of the raw coke oven gas is influenced, and the smooth operation of the process flow is also influenced.
To ensure proper operation of the riser and associated bridge pipe, the inner wall of the riser needs to be cleaned in time. The original method is to arrange manual climbing up the end port of the ascending pipe to clean dangerously and heavily, and to use a long-rod scraper for manual operation, which is high in labor intensity, serious in pollution and dangerous. There are also mechanized and pneumatic technologies for riser cleaning and flue gas suppression, such as some coke oven designs and the use of winches or winches to clean the riser, but without the possibility of pollution and operational convenience. For example, Chinese patent number ZL201320548532.X, the date of the authorized bulletin is 2014, 2 and 26, and the name of the invention is as follows: the application relates to a cleaning device for a coke oven ascending pipe, which comprises a bracket and a cleaning tool, wherein the bracket is provided with two horizontal longitudinal I-shaped steels; the movable trolley is arranged on the horizontal longitudinal I-shaped steel and is provided with two longitudinal channel steels, four idler wheels of a limiting table and a longitudinal rack, the idler wheels are arranged in an inner groove of the horizontal longitudinal I-shaped steel, and the movable trolley is provided with a front guide wheel and a rear guide wheel; a gear shaft mounting seat is mounted under the horizontal longitudinal I-shaped steel, a gear shaft is mounted on the gear shaft mounting seat and a gear is fastened on the gear shaft mounting seat, the gear is meshed with the longitudinal rack, and the gear is driven by a motor; the cleaning tool is a hammer head, a winch with a motor is installed on a two-layer platform of the coal charging car, a fixed guide wheel is also installed on the support, an iron chain of the winch penetrates through the fixed guide wheel to be placed on a rear guide wheel and a front guide wheel of the movable trolley to hoist the hammer head, and the diameter of the hammer head is smaller than the inner diameter of the lifting pipe. The mechanical cleaning device enables the mechanical brush head to be in contact with the wall surface, and brush sweeping or scraping sweeping is realized through rotary motion or vertical linear motion, so that the operation convenience of cleaning the ascending pipe is improved to a certain extent, but the mechanical cleaning cannot inhibit the overflow of smoke, and the environmental atmosphere pollution is easily caused; and the mechanism is complicated and large, the operation is difficult and the cost is high.
The other pneumatic pressing method is that a compressed air nozzle is fixed on the upper part of the ascending pipe, high-pressure air jet flow is sprayed along the wall surface, and the wall surface is cleaned while the pressing smoke overflows. The cleaning method has the advantages that the smoke overflow is reduced, the inner wall surface of the ascending pipe cannot be cleaned comprehensively, the cleaning is not thorough, the cleaning of the dead corner parts is not clean, the acting force of the air flow is small, and the cleaning of coking and sediments with large adhesive force cannot be realized.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defects that the automation and convenience of operation are difficult to realize and the thorough cleaning effect is difficult to achieve in the conventional device and method for cleaning the inner wall of the ascending pipe, and provides a device and a method for pneumatically cleaning the ascending pipe.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the pneumatic blowing device for the ascending pipe comprises a rotary sealing seat, a rotary sand blasting gun and a lifting mechanism, wherein the rotary sand blasting gun is arranged on the lifting mechanism through the rotary sealing seat and is used for lifting, rotating and blowing along the inner wall of the ascending pipe under the driving of the lifting mechanism; wherein,
the rotary sealing seat comprises a static outer barrel and a central shaft tube, the central shaft tube is rotatably arranged in the static outer barrel, a compressed gas channel and a sand suction channel which are mutually independent are arranged between the static outer barrel and the central shaft tube, the compressed gas channel is provided with a static purging gas inlet and a dynamic gas outlet port which rotates along with the central shaft tube, and the sand suction channel is provided with a static sand suction port and a dynamic sand outlet port which rotates along with the central shaft tube; the static outer cylinder is fixedly arranged on the lifting mechanism, the static purging gas inlet is connected with the high-pressure gas generating mechanism, and the static sand suction port is connected to the abrasive container through a static sand suction pipe;
the rotary sand blasting gun comprises a dynamic high-pressure air pipe, a dynamic rotary sand suction pipe, fan blades and a sand blasting nozzle, wherein one end of the dynamic high-pressure air pipe is connected with a dynamic air outlet interface, the other end of the dynamic high-pressure air pipe is connected with the sand blasting nozzle, and the jet flow direction of the sand blasting nozzle and the axis of a central shaft tube form a deflection angle capable of enabling the central shaft tube to generate a rotation moment; one end of the dynamic rotary sand suction pipe is connected with the dynamic sand outlet interface, and the other end of the dynamic rotary sand suction pipe is communicated with the sand blasting nozzle through a connecting pipe, so that negative pressure suction can be generated under the action of high-pressure gas jet flow of the sand blasting nozzle; the fan blades are coaxially connected with the central shaft tube, the fan blades can rotate along with the central shaft tube, and the direction of airflow generated by the fan blades along with the rotation of the central shaft tube faces towards the inside of the ascending tube.
Furthermore, in the rotary sealing seat, the static outer cylinder is provided with an outer cylinder inner cavity, a mechanical seal for sealing a rotary fit clearance between the static outer cylinder and the central shaft tube is arranged in the outer cylinder inner cavity, the static purging gas inlet is arranged on the side wall of the static outer cylinder and communicated with the outer cylinder inner cavity, the pipe wall of the central shaft tube is provided with an air inlet interlayer channel, the outer wall of the central shaft tube is provided with an interlayer air inlet communicated with the outer cylinder inner cavity and the air inlet interlayer channel, and the dynamic air outlet port is arranged on the side wall of the central shaft tube and communicated with the air inlet interlayer channel; the static sand suction port is arranged at the end part of the static outer barrel and communicated with the central through hole of the central shaft tube, and the dynamic sand outlet port is arranged at the other end of the central through hole of the central shaft tube.
Furthermore, the mechanical seal adopts a double-end mechanical seal.
Furthermore, the developments interface of giving vent to anger be equipped with more than two along the circumferencial direction on the lateral wall of central axis pipe, developments high-pressurepipe correspond and be equipped with more than two, the sandblast mouth on each developments high-pressurepipe is along circumferencial direction evenly distributed, and the efflux direction of each sandblast mouth has the same deflection angle.
Furthermore, an outer barrel end cover is arranged at one end of the static outer barrel, the static sand suction interface is arranged on the outer barrel end cover, and the static sand suction interface is coaxial with the central through hole of the central shaft tube; the static outer cylinder is rotatably connected with the central shaft tube through a bearing.
Furthermore, in the rotary sand blasting gun, the dynamic rotary sand suction pipe and the connecting pipe are rigid pipelines and are used as fixed supports of the dynamic high-pressure air pipe and the sand blasting nozzle.
Furthermore, the abrasive in the abrasive container is coal powder particles.
Furthermore, the grinding device also comprises a moving platform, and the lifting mechanism and the grinding material container are both arranged on the moving platform.
The pneumatic sweeping method for the ascending pipe adopts pulverized coal particles as a jet cleaning medium, performs rotary sand blasting cleaning on the inner wall of the ascending pipe in a suction type rotary sand blasting mode, and performs comprehensive sand blasting cleaning on the inner wall of the ascending pipe in an axial reciprocating mode; in the sand blasting cleaning process, the rotating power is used for synchronously driving the fan blades to rotate so as to inhibit the smoke and dust in the ascending pipe from overflowing.
Furthermore, the suction type rotary sand blasting is driven to rotate by using the reverse acting force generated by the sand blasting jet flow, and meanwhile, the negative pressure suction force generated by the high-pressure gas jet flow provides the suction power of the coal dust particles; when the adhesion force of the sediment on the inner wall of the ascending pipe is weak, pure air flow can be selectively sprayed.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) the device comprises a rotary sealing seat, a rotary sand blasting gun and a lifting mechanism, wherein the rotary sand blasting gun is arranged on the lifting mechanism through the rotary sealing seat and is used for lifting, rotating and blowing along the inner wall of the ascending pipe under the driving of the lifting mechanism; the method comprises the steps that rotary sand blasting cleaning is carried out on the inner wall of the ascending pipe in a suction type rotary sand blasting mode, meanwhile, comprehensive sand blasting cleaning is carried out on the inner wall of the ascending pipe in an axial reciprocating mode, and in the sand blasting cleaning process, rotary power is used for synchronously driving the fan blades to rotate to inhibit smoke and dust in the ascending pipe from overflowing; through non-contact sand blasting cleaning, mechanical abrasion does not exist, the cleaning effect is good, the reliability is high, the air pollution is effectively reduced, the structure is simple and compact, and the operation is flexible and convenient;
(2) according to the pneumatic blowing device and method for the ascending pipe, the suction type rotary sand blasting is driven to rotate by utilizing the reverse acting force generated by sand blasting jet flow, and meanwhile, the negative pressure suction force generated by high-pressure gas jet flow provides the suction power of pulverized coal particles, so that the pneumatic blowing device has the advantages of large material spraying range, more uniform distribution, small equipment volume, high working efficiency, more flexible and convenient operation and the like;
(3) according to the pneumatic blowing device and method for the ascending pipe, the grinding materials are pulverized coal particles, the material components are consistent with those of coke, normal coke production cannot be influenced, and the grinding materials are easy to obtain;
(4) according to the pneumatic blowing device for the ascending tube, the two independent fluid pipelines are arranged in the rotary sealing seat, one pipeline is designed in the core part of the central shaft tube, when two-phase flow of sand blasting particle media passes through the rotary central shaft tube, abrasion is reduced to the greatest extent, the structural wear-resisting requirement that the fluid containing solid particles flows at a high speed can be met, and the service life and the working stability of the rotary sealing seat are improved;
(5) according to the pneumatic blowing device for the ascending pipe, the mechanical seal in the rotary seal seat is double-end-face mechanical seal, so that on one hand, working fluid is prevented from overflowing, two fluids are prevented from mutually leaking and mixing, on the other hand, an end-face rotary seal structure is adopted, the rotary resistance is reduced to the greatest extent, and the torque is formed by using the fluid jet reaction force;
(6) according to the pneumatic blowing device for the ascending pipe, more than two dynamic air outlet ports are arranged on the side wall of the central shaft pipe along the circumferential direction, more than two dynamic high-pressure air pipes are correspondingly arranged, the sand blasting nozzles on the dynamic high-pressure air pipes are uniformly distributed along the circumferential direction, and the jet flow directions of the sand blasting nozzles have the same deflection angle, so that the rotary dynamic balance of the central shaft pipe is ensured, and the stability and the reliability of rotary sand blasting work are improved;
(7) according to the pneumatic blowing device for the ascending pipe, the end part of one end of the static outer pipe is provided with the outer pipe end cover, the static sand suction interface is arranged on the outer pipe end cover and is coaxial with the central through hole of the central shaft pipe, the outer pipe end cover structure is adopted, the static outer pipe and the central shaft pipe are convenient to assemble, the sand suction channel is guaranteed not to turn, and the abrasion of solid particles to a pipeline is reduced to the maximum extent;
(8) according to the pneumatic blowing device for the ascending pipe, the dynamic rotary sand suction pipe and the connecting pipe are rigid pipelines and are used as fixed supports of the dynamic high-pressure air pipe and the sand blasting nozzle, so that the rotary sand blasting gun can be far away from the rotary sealing seat, the rotary sealing seat and the rotary sealing seat are not interfered with each other, the rotary sand blasting gun can be conveniently prolonged to meet the height requirement of the ascending pipe, the pneumatic blowing device is convenient to install and high in applicability;
(9) the pneumatic ascending pipe purging device further comprises a moving platform, wherein the lifting mechanism and the grinding material container are mounted on the moving platform and can flexibly move on the coke oven platform so as to be conveniently moved to all ascending pipe positions which are regularly arranged and independently distributed on the platform to implement cleaning operation, and the pneumatic ascending pipe purging device is easier and more convenient to use.
Drawings
FIG. 1 is a schematic structural view of a pneumatic purge apparatus for a riser of the present invention;
fig. 2 is a schematic cross-sectional view of the rotary seal seat of the present invention.
The reference numerals in the schematic drawings illustrate:
100. rotating the seal seat; 1-1, a static outer cylinder; 1-2, a central shaft tube; 1-3, a first bearing; 1-4, a second bearing; 1-5, mechanical sealing; 1-6, outer cylinder end cover; 1-7, static purging gas access; 1-8, inner cavity of outer cylinder; 1-9, interlayer air inlet holes; 1-10, air inlet interlayer channel; 1-11, dynamic air outlet interface; 1-12, static sand suction interface; 1-13, a dynamic sand outlet interface;
200. rotating the sand blasting gun; 2-1, dynamic high-pressure air pipe; 2-2, dynamically rotating the sand suction pipe; 2-3, fan blades; 2-4, connecting pipes; 2-5, a sand blasting nozzle;
300. a lifting mechanism; 400. a mobile platform; 500. an abrasive container; 501. a static sand suction pipe; 600. a riser pipe.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Examples
Referring to fig. 1 and 2, the pneumatic ascending tube purging device of the present embodiment includes a rotary seal seat 100, a rotary sand blasting gun 200 and a lifting mechanism 300, where the rotary seal seat 100 is used to input two-phase fluid media independent of each other and has a rotation function, the rotary sand blasting gun 200 is used to provide rotation driving and negative pressure suction and injection of solid particles, and the rotary sand blasting gun 200 is installed on the lifting mechanism 300 through the rotary seal seat 100 and is used to perform lifting rotation purging along the inner wall of the ascending tube 600 under the driving of the lifting mechanism 300. Wherein,
as shown in fig. 2, the rotary seal seat 100 is a sealed rotary connector for conveying fluid media in a 360-degree rotation manner, and includes a static outer cylinder 1-1 and a central shaft tube 1-2, the central shaft tube 1-2 is rotatably installed in the static outer cylinder 1-1, and a compressed gas channel and a sand suction channel which are independent of each other are provided between the static outer cylinder 1-1 and the central shaft tube 1-2, the compressed gas channel has a static purge gas inlet 1-7 and a dynamic air outlet 1-11 rotating with the central shaft tube 1-2, and the sand suction channel has a static sand suction port 1-12 and a dynamic sand outlet 1-13 rotating with the central shaft tube 1-2; the static outer cylinder 1-1 is fixedly arranged on the lifting mechanism 300, the static purging gas inlet 1-7 is connected with the high-pressure gas generating mechanism, and the static sand suction port 1-12 is connected to the abrasive container 500 through a static sand suction pipe 501. Specifically, in the rotary seal seat 100, the static outer cylinder 1-1 is provided with an inner cavity 1-8 of the outer cylinder, a mechanical seal 1-5 for sealing a rotary fit clearance between the static outer cylinder 1-1 and the central shaft tube 1-2 is arranged in the inner cavity 1-8 of the outer cylinder, and the mechanical seal 1-5 plays a role of rotary seal, so that working fluid is prevented from overflowing, and the two fluids are prevented from leaking and mixing mutually. The static purging gas access port 1-7 is arranged on the side wall of the static outer barrel 1-1 and communicated with the inner cavity 1-8 of the outer barrel, the wall of the central shaft tube 1-2 is provided with an air inlet interlayer channel 1-10, the outer wall of the central shaft tube 1-2 is provided with an interlayer air inlet 1-9 communicated with the inner cavity 1-8 of the outer barrel and the air inlet interlayer channel 1-10, the dynamic air outlet port 1-11 is arranged on the side wall of the central shaft tube 1-2 and communicated with the air inlet interlayer channel 1-10, the inner cavity 1-8 of the outer barrel and the outer wall of the central shaft tube 1-2 form an annular cavity, high-pressure compressed gas enters the annular cavity from the static purging gas access port 1-7 and enters the air inlet interlayer channel 1-10 on the side wall of the rotating central shaft tube 1-2 through the interlayer air, and finally, the gas flows out from the dynamic gas outlet interfaces 1-11 to form a compressed gas channel in the rotary seal seat 100. The static sand suction port 1-12 is arranged at the end part of the static outer cylinder 1-1 and is communicated with a central through hole of the central shaft tube 1-2, the dynamic sand outlet port 1-13 is arranged at the other end of the central through hole of the central shaft tube 1-2, fluid medium containing solid particles is sucked by the static sand suction port 1-12 and flows out of the dynamic sand outlet port 1-13 after passing through the central through hole of the rotating central shaft tube 1-2, and a sand suction channel is formed in the rotating sealing seat 100. In the present embodiment, the mechanical seals 1-5 are preferably double-ended mechanical seals, which minimize rotational resistance and achieve torque generation by fluid jet reaction. More than two interlayer air inlets 1-9 are uniformly arranged on the outer wall of the central shaft tube 1-2 along the circumferential direction, so that the stability of high-pressure gas delivery in the rotating process of the central shaft tube 1-2 is ensured. In addition, in order to ensure the low-resistance operation of the rotary seal seat 100, the static outer cylinder 1-1 and the central shaft tube 1-2 are preferably rotationally connected through a bearing, that is, two ends of the static outer cylinder 1-1 are respectively rotationally matched and connected with the central shaft tube 1-2 through a first bearing 1-3 and a second bearing 1-4, the bearings are assembled and connected through steps on the static outer cylinder 1-1 and the central shaft tube 1-2 and conventional means such as a shaft check ring and the like, so that the rotary seal seat 100 has the functions of rotation and limiting support, and the low-resistance operation of the rotary seal seat 100 is ensured. In order to facilitate the assembly of the rotary seal seat 100, an outer barrel end cover 1-6 is arranged at one end of the static outer barrel 1-1, the static sand suction port 1-12 is arranged on the outer barrel end cover 1-6, and the static sand suction port 1-12 is coaxial with a central through hole of the central shaft tube 1-2, so that the static outer barrel 1-1 and the central shaft tube 1-2 can be assembled conveniently, the sand suction channel is ensured not to turn, the abrasion of solid particles to a pipeline is reduced to the greatest extent, and the service life and the working stability of the rotary seal seat 100 are improved. Preferably, the outer barrel end cover 1-6 is connected with the static outer barrel 1-1 through a sealing flange structure, so that the connection sealing performance of the outer barrel end cover 1-6 and the static outer barrel 1-1 is ensured, and the connection assembly is convenient.
As shown in fig. 1, the rotary sand blasting gun 200 comprises a dynamic high-pressure air pipe 2-1, a dynamic rotary sand suction pipe 2-2, a fan blade 2-3 and a sand blasting nozzle 2-5, wherein one end of the dynamic high-pressure air pipe 2-1 is connected with a dynamic air outlet port 1-11, the other end is connected with the sand blasting nozzle 2-5, and the jet direction of the sand blasting nozzle 2-5 and the axis of a central shaft pipe 1-2 have a deflection angle which can enable the central shaft pipe 1-2 to generate a rotation moment; one end of the dynamic rotary sand suction pipe 2-2 is connected with the dynamic sand outlet interface 1-13, and the other end is communicated with the sand blasting nozzle 2-5 through the connecting pipe 2-4, so that negative pressure suction can be generated under the high-pressure gas jet action of the sand blasting nozzle 2-5; compressed gas enters the dynamic high-pressure air pipe 2-1 through the dynamic air outlet interface 1-11 of the rotary sealing seat 100 and is ejected at a high speed through the sand blasting nozzle 2-5, negative pressure suction is formed in the dynamic rotary sand suction pipe 2-2 and the connecting pipe 2-4, then solid fluid-containing media are sucked through the static sand suction interface 1-12 of the rotary sealing seat 100 and ejected at a high speed through the sand blasting nozzle 2-5 along with compressed air, and the central shaft pipe 1-2 is driven to rotate in the static outer cylinder 1-1 under the reaction force of high-speed jet flow, so that the suction type rotary sand blasting purging function is realized. The fan blades 2-3 are coaxially connected with the central shaft tube 1-2, the fan blades 2-3 can rotate along with the central shaft tube 1-2, and the direction of airflow generated by the fan blades 2-3 along with the rotation of the central shaft tube 1-2 faces the inside of the ascending tube 600. Specifically, the dynamic rotary sand suction pipe 2-2 is coaxially and fixedly connected with the central shaft pipe 1-2, the fan blades 2-3 are coaxially fixed on the dynamic rotary sand suction pipe 2-2, the dynamic rotary sand suction pipe 2-2 rotates to drive the fan blades 2-3 to rotate to generate downward airflow, and the airflow blows towards the interior of the coke oven, so that the overflow of smoke and dust in the ascending pipe 600 is effectively inhibited. In the rotary sand blasting gun 200, the dynamic rotary sand suction pipe 2-2 and the connecting pipe 2-4 are rigid pipelines and are used as fixed supports for the dynamic high-pressure air pipe 2-1 and the sand blasting nozzle 2-5, so that the rotary sand blasting gun 200 can be far away from the rotary sealing seat 100, the dynamic high-pressure air pipe 2-1 and the sand blasting nozzle 2-5 are not interfered with each other, the rotary sand blasting gun 200 can be conveniently prolonged to meet the height requirement of the ascending pipe 600, the installation is convenient, and the applicability is strong. Preferably, more than two dynamic air outlet connectors 1-11 are arranged on the side wall of the central shaft tube 1-2 along the circumferential direction, more than two dynamic high-pressure air tubes 2-1 are correspondingly arranged, the sand blasting nozzles 2-5 on each dynamic high-pressure air tube 2-1 are uniformly distributed along the circumferential direction, the jet flow directions of the sand blasting nozzles 2-5 have the same deflection angle, the same-direction rotating torque is generated while jet flow is jetted, the rotating sealing seat 100 is enabled to rotate, meanwhile, the rotating dynamic balance of the central shaft tube 1-2 is ensured, and the working stability and reliability of the rotating sand blasting cleaning device are improved.
In addition, in the pneumatic blowing device for the ascending pipe of the embodiment, the abrasive in the abrasive container 500 is preferably pulverized coal particles, the material composition is consistent with that of coke, normal coke production is not affected, and the abrasive is easy to obtain. In addition, as shown in fig. 1, in order to facilitate the movement of the whole pneumatic ascending pipe purging device, the pneumatic ascending pipe purging device further comprises a moving platform 400, the lifting mechanism 300 and the abrasive container 500 are both installed on the moving platform 400, and rollers are arranged at the bottom of the moving platform 400, and can bear the lifting mechanism 300 and the abrasive container 500 as working loads to flexibly move on the coke oven platform so as to move to all ascending pipe positions which are regularly arranged and independently distributed on the platform to implement the purging operation, so that the pneumatic ascending pipe purging device is easier and more convenient to use. The lifting mechanism 300 carries the rotary sand blasting device composed of the rotary seal seat 100 and the rotary sand blasting gun 200, and is used for driving the rotary sand blasting device to move along the axis of the ascending pipe 600, and the lifting mechanism 300 can adopt various existing lifting devices, and will not be described herein again.
The embodiment also discloses a pneumatic purging method for the ascending pipe, which is specifically summarized as follows:
pulverized coal particles are used as a jet cleaning medium, the inner wall of the ascending pipe 600 is cleaned by rotary sand blasting in a suction type rotary sand blasting mode, and meanwhile, the inner wall of the ascending pipe 600 is cleaned by overall sand blasting in an axial reciprocating mode; in the sand blasting cleaning process, the rotating power is used for synchronously driving the fan blades to rotate to inhibit the overflow of the flue gas and dust in the ascending pipe 600. Through non-contact sandblast cleaning, do not have mechanical wear, do not receive the ascending pipe inner wall roughness influence, clean effectually, the reliability is high, has effectively reduced the atmosphere pollution to simple structure is compact, and the flexible operation is convenient. The suction type rotary sand blasting is driven to rotate by using a reverse acting force generated by sand blasting jet flow, and meanwhile, the suction power of the coal dust particles is provided by using a negative pressure suction force generated by high-pressure gas jet flow; pure air may be selectively injected when the adhesion of the deposits on the inner wall of the rising pipe 600 is weak. The spraying device has the advantages of large material spraying range, more uniform distribution, small equipment volume, high working efficiency, more flexible and convenient operation and the like.
Referring to fig. 1 and 2, in the pneumatic purging device for the ascending pipe according to the present embodiment, during operation, the static sand suction ports 1 to 12 of the rotary seal seat 100 are connected to the abrasive container 500 through the static sand suction pipe 501, and the static purging gas ports 1 to 7 are connected to a high-pressure gas generating mechanism, such as an air compressor. Compressed air and sand-containing fluid independently flow in the rotary seal seat 100, the compressed air enters the dynamic high-pressure air pipe 2-1 through a compressed air channel of the rotary seal seat 100, high-speed jet flow is formed in the rotary sand-blasting gun 200 through a sand-blasting nozzle 2-5, vacuum negative pressure is formed at an inlet of a sand-sucking end of the connecting pipe 2-4 due to the negative pressure effect of the high-speed jet flow, the sand-containing air flow is sucked to continuously suck abrasive particles, namely coal dust particles, from the abrasive container 500, and the jet flow and the sand-containing air flow are mixed and accelerated to form sand-blasting working jet flow. When the lateral component of the jet reaction force is large enough and the formed rotation torque is enough to overcome the frictional resistance, the central shaft tube 1-2 can drive the rotary sand-blasting gun 200 to rotate around the axis, so that the rotary sand-blasting cleaning work is realized, and the cleaning of the inner wall of the whole ascending pipe 600 can be completed by matching with the lifting mechanism 300. In the rotary sand blasting cleaning process, the fan blades 2-3 rotate along with the central shaft tube 1-2 to generate wind pressure opposite to the airflow direction of the ascending tube 600, and the overflow of flue gas and dust in the ascending tube 600 is restrained. Through foretell non-contact sandblast cleans, do not have mechanical wear, do not receive the ascending pipe inner wall unevenness influence, clean effectually, the reliability is high, has effectively reduced atmospheric pollution to simple structure is compact, and the flexible operation is convenient.
The pneumatic blowing device and method for the ascending pipe have the following advantages that:
1. the sediment is cleaned by using a sand blasting method, so that the problems of mechanical abrasion, incomplete cleaning, recess persistence and the like caused by mechanical contact of methods such as scraping, brushing and the like are avoided, and the reliability is high; the coal powder jet flow cleaning force is large, and the cleaning effect is good;
2. the sand blasting method adopts a suction type, so that the complexity of a mechanism of a press-in type sand blasting technology is avoided, and the mechanism design and arrangement are simpler;
3. the pulverized coal is used as a sand blasting abrasive, the material composition is consistent with that of coke, normal coke production cannot be influenced, and the abrasive is easy to obtain;
4. the fan blades synchronously rotate along with the sand blasting gun play a role in inhibiting the overflow of smoke dust, so that the atmospheric pollution is reduced;
5. the lifting mechanism moves up and down and the moving platform moves in a plane mode to expand the operation of cleaning deposits by sand blasting to the inner wall surface of the whole ascending pipe, the operation is convenient, the coverage area is wide, the lifting mechanism can be applied to all ascending pipes on a coking furnace platform, the manual labor intensity is reduced, the operation automation is convenient to realize, and the operation convenience is improved.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (10)
1. The utility model provides a pneumatic device that sweeps of tedge which characterized in that: the rotary sand blasting machine comprises a rotary sealing seat (100), a rotary sand blasting gun (200) and a lifting mechanism (300), wherein the rotary sand blasting gun (200) is arranged on the lifting mechanism (300) through the rotary sealing seat (100) and is used for lifting, rotating and blowing along the inner wall of an ascending pipe (600) under the driving of the lifting mechanism (300); wherein,
the rotary sealing seat (100) comprises a static outer cylinder (1-1) and a central shaft tube (1-2), the central shaft tube (1-2) is rotatably arranged in the static outer cylinder (1-1), a compressed gas channel and a sand sucking channel which are independent of each other are arranged between the static outer cylinder (1-1) and the central shaft tube (1-2), the compressed gas channel is provided with a static purging gas inlet (1-7) and a dynamic air outlet interface (1-11) which rotates along with the central shaft tube (1-2), and the sand sucking channel is provided with a static sand sucking interface (1-12) and a dynamic sand outlet interface (1-13) which rotates along with the central shaft tube (1-2); the static outer cylinder (1-1) is fixedly arranged on the lifting mechanism (300), the static purging gas inlet (1-7) is connected with the high-pressure gas generating mechanism, and the static sand suction port (1-12) is connected to the abrasive container (500) through a static sand suction pipe (501);
the rotary sand blasting gun (200) comprises a dynamic high-pressure air pipe (2-1), a dynamic rotary sand suction pipe (2-2), fan blades (2-3) and a sand blasting nozzle (2-5), wherein one end of the dynamic high-pressure air pipe (2-1) is connected with a dynamic air outlet interface (1-11), the other end of the dynamic high-pressure air pipe is connected with the sand blasting nozzle (2-5), and the jet flow direction of the sand blasting nozzle (2-5) and the axis of a central shaft pipe (1-2) have a deflection angle capable of enabling the central shaft pipe (1-2) to generate a rotation moment; one end of the dynamic rotary sand suction pipe (2-2) is connected with the dynamic sand outlet interface (1-13), and the other end is communicated with the sand blasting nozzle (2-5) through a connecting pipe (2-4), so that negative pressure suction can be generated under the action of high-pressure gas jet flow of the sand blasting nozzle (2-5); the fan blades (2-3) are coaxially connected with the central shaft tube (1-2), the fan blades (2-3) can rotate along with the central shaft tube (1-2), and the direction of airflow generated by the fan blades (2-3) along with the rotation of the central shaft tube (1-2) faces towards the inside of the ascending tube (600).
2. A pneumatic riser purge apparatus as claimed in claim 1, wherein: in the rotary sealing seat (100), the static outer cylinder (1-1) is provided with an outer cylinder inner cavity (1-8), a mechanical seal (1-5) for sealing a rotary fit clearance between the static outer cylinder (1-1) and the central shaft tube (1-2) is arranged in the outer cylinder inner cavity (1-8), the static purging gas inlet (1-7) is arranged on the side wall of the static outer cylinder (1-1) and communicated with the outer cylinder inner cavity (1-8), the wall of the central shaft tube (1-2) is provided with an air inlet interlayer channel (1-10), the outer wall of the central shaft tube (1-2) is provided with an interlayer air inlet hole (1-9) for communicating the outer cylinder inner cavity (1-8) with the air inlet interlayer channel (1-10), and the dynamic air outlet port (1-11) is arranged on the side wall of the central shaft tube (1-2) and communicated with the air inlet interlayer air inlet hole The air interlayer channels (1-10) are communicated; the static sand suction port (1-12) is arranged at the end part of the static outer cylinder (1-1) and communicated with the central through hole of the central shaft tube (1-2), and the dynamic sand outlet port (1-13) is arranged at the other end of the central through hole of the central shaft tube (1-2).
3. A pneumatic riser purge apparatus as claimed in claim 2, wherein: the mechanical seal (1-5) adopts double-end mechanical seal.
4. A pneumatic riser purge apparatus as claimed in claim 3, wherein: the dynamic air outlet connector (1-11) is provided with more than two air outlet connectors on the side wall of the central shaft tube (1-2) along the circumferential direction, the dynamic high-pressure air tube (2-1) is correspondingly provided with more than two air outlet connectors, the sand blasting nozzles (2-5) on each dynamic high-pressure air tube (2-1) are uniformly distributed along the circumferential direction, and the jet flow directions of the sand blasting nozzles (2-5) have the same deflection angle.
5. A pneumatic purge apparatus for risers as set forth in claim 4 wherein: an outer barrel end cover (1-6) is arranged at one end of the static outer barrel (1-1), the static sand suction port (1-12) is arranged on the outer barrel end cover (1-6), and the static sand suction port (1-12) is coaxial with a central through hole of the central shaft tube (1-2); the static outer cylinder (1-1) is rotatably connected with the central shaft tube (1-2) through a bearing.
6. A pneumatic purge apparatus for risers according to any of claims 1 to 5, wherein: in the rotary sand blasting gun (200), the dynamic rotary sand suction pipe (2-2) and the connecting pipe (2-4) are both rigid pipelines and are used as fixed supports of the dynamic high-pressure air pipe (2-1) and the sand blasting nozzle (2-5).
7. A pneumatic purge apparatus for risers as set forth in claim 6 wherein: the abrasive in the abrasive container (500) is coal powder particles.
8. A pneumatic purge apparatus for risers as set forth in claim 7 wherein: the grinding device is characterized by further comprising a moving platform (400), wherein the lifting mechanism (300) and the grinding material container (500) are both arranged on the moving platform (400).
9. A pneumatic purging method for a riser is characterized by comprising the following steps: pulverized coal particles are used as a jet cleaning medium, the inner wall of the ascending pipe (600) is cleaned by rotary sand blasting in a suction type rotary sand blasting mode, and meanwhile, the inner wall of the ascending pipe (600) is cleaned by overall sand blasting in an axial reciprocating mode; in the sand blasting cleaning process, the rotating power is utilized to synchronously drive the fan blades to rotate so as to inhibit the overflow of the flue gas and the dust in the ascending pipe (600).
10. A method according to claim 9, wherein the method comprises the steps of: the suction type rotary sand blasting is driven to rotate by using a reverse acting force generated by sand blasting jet flow, and meanwhile, the suction power of the coal dust particles is provided by using a negative pressure suction force generated by high-pressure gas jet flow; when the adhesion force of the sediment on the inner wall of the ascending pipe (600) is weak, pure air flow can be selectively sprayed.
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| CN201910660786.2A CN110272749B (en) | 2019-07-22 | 2019-07-22 | Pneumatic purging device and method for ascending pipe |
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| CN201910660786.2A CN110272749B (en) | 2019-07-22 | 2019-07-22 | Pneumatic purging device and method for ascending pipe |
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| CN110272749A true CN110272749A (en) | 2019-09-24 |
| CN110272749B CN110272749B (en) | 2024-07-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116511642A (en) * | 2023-07-04 | 2023-08-01 | 西科沃克瑞泰克热处理设备制造(天津)有限公司 | Adjustable nitrogen conveying pipe of brazing furnace |
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| CN109679669A (en) * | 2017-10-18 | 2019-04-26 | 株式会社斯加科技 | Tedge clearing apparatus |
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| CN102504840A (en) * | 2011-10-27 | 2012-06-20 | 大连华锐重工集团股份有限公司 | Compressed air nozzle type cleaning device for ascension pipe of coke oven |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116511642A (en) * | 2023-07-04 | 2023-08-01 | 西科沃克瑞泰克热处理设备制造(天津)有限公司 | Adjustable nitrogen conveying pipe of brazing furnace |
| CN116511642B (en) * | 2023-07-04 | 2024-02-20 | 西科沃克瑞泰克热处理设备制造(天津)有限公司 | Adjustable nitrogen conveying pipe of brazing furnace |
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| CN110272749B (en) | 2024-07-26 |
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